if you're planning a few days "basecamp" for your trip, dont rule out a tent rather than a B&B etc cos camping at proper sites is very cheap, and you still have reasonable facilities. but if your only going away for a week then tenting might not be worth the setup hassle.
either way, anything valuable is likely to just be a satnav/camera/smartphone/gopro as you'll probably not take a laptop/ipad/kindle for just a week, probably not even two weeks on a bike, so you can take the small list of valuables with you on your day trips.
take minimal clothing ie 1 pair denims/zippies, 1 light fleece, 4 days hiking tees (easy washable & quick drying)
light summer bike gear
a set of waterproofs.
if camping, consider taking a small tarp to set up as a shade over your tent - it gets hot in europe and a hot tent is an oven.
and drink plenty fluids (not just booze).